Sheet-feeding apparatus.



G. SPIBSS. SHEET FEEDING APPARATUS. APPLIOATION FILED APR. Z, 1909 967,077. W l Patented Aug. 9 1910 encae seines, `or aniram connnwrra, sanitaria'.

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' .M apll'oatimiv :tiled April 2, Qrial No; 487,430.

Be' it known that I5 GnoncSPIass, subject vof'the Emperor ofGermany, residing at Leipzig Connevvitz, Germany,` have invented new and useful Improvements in .Sheet Feeding Apparatus, of' which the 'following is a specification.

In those devices in Which'bymechanieal means one sheet after the other must be taken from a supply and led to the delivery the transfer of the sheet occurs by means of afriction wheel. `This is a rubbing Wheel continuously rotating. which sinks to the sheet for the, purpose of transportincr and, during the restof thevtiine mustl be lifted from'the sheetff The putting into action of the friction Wheel is to be effected by the l 4sheet itself and in case of delicate paper"care lmust be taken that in 4s ite of the Weakness sible. t is customer .forthe transfer' of momentarily of the- `aper thisltrans er' of motion isposthis-movementto emp oy a feeler arm lWhich'.

enters a deliessionin "the transfer .roller overwhich t e sheet must becarried along. In such arrangement the feeler arm -is lifted and 'therelease `vvhich is intended to lift the friction armis vthereby bron ht into action.4 4The release arrangementsl vv 'ch are in use for this urpose are of very involved nature and di cult to'apply and regulateso that they can be supervisedonly byfvery skilful Workm Thisdeicienc'y is to beremoved accordin 4to this invention by means of a freeing evice for the friction Wheel having.

inclined faces and arrested bya locking deeg???l vice which serves as a ycarrier for-,the sheet,-

'Ihis invention is set forth in the following specification and .claim and illustrated in the annexed drawing in Which;-

Figure lv is a sectional sidefelevation of a deviceor sheet feeder embodying this inven tion. Fig. 2 is a plan view of the freeing device; g.

. The friction Wheel A is journaled 41n a bell crank lever B which can be moved by a second bell crank lever C.4 By means of spring D and said levers B and C the friction Wheel A. ia pressed down onto the table. l

The freein device which is intended to t(lift the friction 'Wheel consists accordi to this"invention-.cfaireeing device F with an inclined iacei.A The ireein deviceris intended to engage the bellcran lever-C and which ifi-retarded in its. action by a locking device or arm G which at the for part of its circumference as provided l Wheel is ut out of action.

- "same time servesas a carrier `for the sheet feeler H. In the example shown inv lthe drawingthe'freeing device I? is mounted for vertical movement in a vertical channel in the crosacarrier W and a spring X connectedtoits upper end tends to normally draw itlupward. The freeing'device F is, .howl ever? held inits lowermostposition bythe locking arm Gr. Vrllhe lookin arm G islpivotally 'suspended and provi ed with a nose I which butts vagainstthe inclined; recess of the freeing device l?.A @n areleasingtstroke of vthe. locking device its nose Itvvill slide over the inclined surface E ofthe freeing device F and will be forced' by the latter to coy make a determinedsWing. The locking arm o, A

QG orthe shaft K thereof also serves as a carrie'r for the-sheet feeler jointed thereto. In vthe position of rest shown the sheet feeler entersa cut-out in thei transfer roller L. "Thesheet -feeler His caused to make a stroke or swing asl soon as a sheet is led to the transfer roller L. The edge of the contacting" sheet gives asvvino to the feelerarm.v 'I-Iereb itis to be brought Within reach of al movab e part ofthe machine and to receive a movement Which must be transferred to.4 y thalocking device G. A slight' movement l of the latterhovvever also causes the release of the freeing device F which rises under the spring action and at the same time-byVv means of its inclinedface E eifects a full v swing of the locking armA of suicient `ex l 4tent'to liftthefeeler'H vabove the plane of 90 o n thezpathof the sheet so that the sheet4 feed can take place-without hindrance.

V. Inth'e example 'shown a spring actuated tappet M is brought` under the action of va rotatingt-appet Wheel N which is shownonly caf .with teeth. By the Vturning of this wheel the tappet-M receives from' such teeth rapidly succeeding small im'pacts`. If now the v l feeler arm is lifted so far by the advancing .1.00j sheet that its rear end O cornes into 'the path of the' tappet M the blow of the .same Will cause the locking; device to make a small swing which then causes the `Vrelease of the freeing device l?.V The latter rises 'under spring action and carries the bell crank levers B and C as also vthe, frictionWheel A 3 into elevated positiom' that'fis" the friction y f To holl thevvheel 'in the release positibn until anew sheet is to be advanced an arm Ii/ y1. .f 3

is jcintedV to Vthe .freeingv device F andvvheiif i lifted engages under'the projection Qof bell crank lever C. This must also occur 1n case the friction Wheel A has not advanced any sheet and the release arrangement has not come into act1on.

For lifting the arm P there is provided a 5 curved disk S on the shaft R which makes one revolution for the advance of each sheet. On this disk rests the arm P either directly or by means of the roller T. In this manner it is possible to lift the arm P and also t-he arm A in the desired moment. This curved disk S can also be used to return the freeing device to its starting position when a projection U thereof engages behind ra correspending projection V of the freeing device F. As the latter descends the locking d`evicev G With its nose I snaps into therecess according to the present invention all parts of the freeing device are mounted on a common cross carrier W. This also insures a good mounting of the several parts and their effective engagement .'or mesh duringy Work. The freeing arrangement as an eiltirety can be rst mounted and placed into the machine in complete condition, and is therefore also dismountable as a Whole. By the compact arrangement of the entire freeing arrangement it is also possible to operate on sheets of twenty-seven and one half (Q7-) cm. Width by this arrangement While the former arrangements of similar sort are able to deliver only sheets of aft least 35 to 36 cm.

The sheets are forwarded to the roll A by any suitable feeding machine (npt shown) and are taken from the roll L by the gripper of anyprinting press or the like.

^ ,What I Aclaim is Sheet feeding mechanism comprising a 'friction Wheel, lever mechanism for set- `ting the Wheel into and out of action, a freeing device for actuating the leve:` mechanism to raise the wheel, a locking device for the freeing device, a sheet feeler for actuat ing the locking device, andtappet mechanism for moving the locking device to releasing position.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

GEORG SPIESS.

Witnesses:

RUDOLPH FRICKE, J BERNH. ScHssLER. 

